The Strike Industries Extended Magazine Plate For Glock®G17 9MM / G22 .40CAL was designed to provide smoother magazine reloading through a slow drag / no snag design while maintaining maximum magazine capacity with any OEM Glock®magazine. The Extended Magazine Plate provides an additional 6 rounds to any G17 Glock®magazine in addition to adding plus 5 to any G22 .40 cal magazine. Included is our special steel locking plate. Compared to other magazine extension plates on the market, our steel locking plate features a hook design which adds extra locking security to increase the durability of your magazine & extended magazine plate when fully loaded with rounds. Our extended magazine plate provides better gripping and overall control along with increasing the overall efficiency of reloads. Give your Glock®the extra rounds it deserves with the Strike Industries Extended Magazine Plate for Glock®G17 9mm / G22 .40 CAL.